Three-dimensional sign



FIG. 1 is a perspective view of a three-dimensional sign according to a first embodiment of our design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a perspective view of a three-dimensional sign according to a second embodiment of our design;

FIG. 9 is a front elevation view thereof;

FIG. 10 is a back elevation view thereof;

FIG. 11 is a right side elevation view thereof;

FIG. 12 is a left side elevation view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The broken lines illustrate portions of the three-dimensional sign that form no part of the claimed design. The text in broken lines in FIGS. 8-9 also forms no part of the claimed design.

The portions shown in a pattern of stipple illustrate areas of contrasting appearance.

The three-dimensional sign is suitable to facilitate passenger trips for autonomous vehicles. 

CLAIM The ornamental design for a three-dimensional sign, as shown and described. 